1318894513 has 2 divisors, whose sum is σ = 1318894514. Its totient is φ = 1318894512.

The previous prime is 1318894477. The next prime is 1318894517. The reversal of 1318894513 is 3154988131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1262238784 + 56655729 = 35528^2 + 7527^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318894513 - 2¹³ = 1318886321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1318894513.

It is not a weakly prime, because it can be changed into another prime (1318894517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659447256 + 659447257.

It is an arithmetic number, because the mean of its divisors is an integer number (659447257).

Almost surely, 2^1318894513 is an apocalyptic number.

It is an amenable number.

1318894513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318894513 is an equidigital number, since it uses as much as digits as its factorization.

1318894513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 43.

The square root of 1318894513 is about 36316.5872983682. The cubic root of 1318894513 is about 1096.6549935267.

It can be divided in two parts, 13188 and 94513, that added together give a palindrome (107701).

The spelling of 1318894513 in words is "one billion, three hundred eighteen million, eight hundred ninety-four thousand, five hundred thirteen".